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One 1" threaded tapped steel ball
One 1" threaded tapped steel ball
1" dia. tapped (1/4-20) steel Ball Price List
More sizes of threaded steel balls
These blind tapped AISI 1018 (cold rolled) steel balls are tapped 1-1/2 times thread diameter deep.
http://americandad.biz/ts/blindhole.jpg
Brass balls also have the ability to resist the corrosive effects of fuel oil, gasoline, butane, dry carbon dioxide, benzene, lime-sulphur mixture and similar chemical agents.
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